Potomac Waterfront Flood Mitigation Study - City of Alexandria

Introduction
Factory and Strand Street are included in this focus area. South Union Street and North Union
Street bound the focus area on the west. It extends to the north where Pendleton Street runs into
North Union Street and ends in the south at Wolfe Street. Approximately 22 structures in the
Waterfront study area are predicted to flood during the 100-year event.
North Union: This focus area is entirely residential row houses. The focus area is bounded by
Oronoco and Cameron Streets and is located just west of the Waterfront Commercial focus area.
Approximately 37 structures within the North Union Street Study Area are predicted to flood
during the 100-year event.
1.4 REPORT ORGANIZATION
The purpose of this report is to evaluate the solutions identified in the Initial Flooding
Assessment Report and recommend the most effective solutions. The remainder of this report is
organized as follows:
Section 2 summarizes the process that was followed to select mitigation options to be
evaluated in detail.
Section 3 describes the mitigation measures identified in Section 2 and the general feasibility
of the mitigation measure as a solution to the problems identified in these focus areas.
Section 4 summarizes the existing data review; the context for the cultural and natural
resources analyses; repetitive loss structures within the study area; and the consideration of
sea level rise for this study.
Section 5 describes the methodology used to define and analyze the costs and benefits of
mitigation solutions that involve structural design or alteration.
Section 6 summarizes the conceptual design analyses and results for the structural mitigation
measures.
Section 7 provides overall study recommendations.
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